Double or tandem spring draft-rigging for railway-cars.



No. 644,679. Patented Mar. 6, |900.

. W. H. MINER. DOUBLE 0R TANDEM SPRING DRAFT RIGGING FUR RAILWAY GARS.

. (Application led Mar. 31, 1899.) (No Model.)

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. Nrrnn STATES WILLIAM H. MINER, OF CHICAGO, ILLINOIS.

DOUBLE OR TANDEM SPRING DRAFT-RIGGING FR RAILWAY-CARS.

SIECIFICATION forming part of Letters Patent No. 644,679, dated March 6, 1900.

Application filed. March 31, l 8 9 9.

T0 all whom, t may concern:

Be it known that I, WILLIAM H.MINER, a citizen of the United States, residing in Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Double or Tandem Spring Draft- Rigging for Railway-Cars, of which the following is a specification.

My invention relates to improvements in the construction of double or tandem spring draft-rigging for railway-cars.

The object of my invention is to improve and strengthen the connection between the draw-bar and its extensions and the followers which bear against the tandem springs under either pulling or buffing strains, and thus Inaterially add to the strength and efficiency of the draft-rigging as a whole without increasing its weight or cost.

My invention consists in the means I elnploy to accomplish this object or result-that is to say, in the novel construction of parts and devices and in the novel combinations of parts and devices herein shown and described, and specified in the claims.

In the accompanying drawings, forming a part of this specification, Figure l is a vertical longitudinal section of a double or tandem spring draft-rigging embodying my invention. Fig. 2 is a horizontal section, and Fig. 3 is a detail perspective view, of one of the draw-bar extensions or plates.

In the drawings similar letters of reference indicate like parts in all the figures.

In said drawings, A A are the draft-timbers; A', the end sill; A2, the buffer-plate, and A2 the carrier-iron, secured by bolts to the end sill to support or guide the draw-bar O of the car-coupler.

B B are the draw-bar extensions, pocketstraps, or plates, secured to the rear end of the coupler draw-bar O by bolts O C', having threaded nuts O2 C2 in conjunction with the flanges b at the front ends of the extensionplates B, which fit in transverse grooves or gains O3 at the rear end of the draw-bar, so that the anges or shoulders b are embraced between the front and rear shoulders C4 O5, forming the walls of said grooves or gains C3. The draw-bar extension-plates B have side ribs b h', an intermediate strengthening-rib Serial No. 711,234. (No model.)

b2, a transverse rib or offset h4, a rear shoulder, flange, or projection h5, and a transverse recess or groove be to receive the end of the intermediate spacing-block B. The rear spacing-block B2 abuts against the rear shoulder or projection b5 on the extension-plate.

B3 B3 are bolts inserted through ,the extension-plates B and the spacing or abutting blocks B B2 to secure the extension-plates together and aid in holding the spacing or abutting blocks in place against the followers F.

D D and d d are tandem-arran ged springs, the springs D D' and d d being preferably graduated or of different sizes, so that the springs d d' may fit within the larges springs D D.

F F are followers bearing against the opposite ends of the springs, the same being furnished with central thimbles or projections f to aid in holding the smaller springs in place.

G G are the draw-bar stop-castings, secured to the inner faces of the draft-timbers A A, the same having flanges or guides G' to support and guide the followers, and stops g for the followers to abut against, and projections g' entering gains in the draft-timbers to aid in securing the stop-castings firmly to the draw-bars.

g2 are the bolts by which the stop-castings are secured to the draft-timbers.

g3 are belts extending through the 'stopcastings to secure thelower guide G thereto, the lower guide being preferably a removable one and not made integral with the stop-castings. The upper draw-bar extension-plate B is preferably provided with a socket or projection bs to receive the head of the bolts B3 and prevent the same from turning.

As the spacing or abutment block B fits at its ends in the transverse recess he in the draw-bar extensions or plates B, the pressure of the followers upon the spacing-block does not have a shearing strain upon the bolt B3, and the strength and efficiency are materially increased. In like manner the shoulder or flange b5 materially aids in holding the rear spacing or abutment block B2 in place against the pressure of the rear follower, and as the front follower abuts against the rear end of the draw-bar C it is also firmly held. The central rib b2 of the draw-bar extension or plate B is provided with bosses b9, surrounding the bolt-holes, to increase the bearing-surface of the plate against the bolts.

I claiml. In atandemespringdraft-riggingforrail- Way-cars, the combination with the draftt-imbers and stop-castings, of a draw-bar, tandem-arranged springs,followeis and drawbar extensions or plates, furnished with transverse recesses, and a spacing or abutment block bearing and fitting at its ends in said transverse recesses of said draw-bar extensions or plates and bearing against the shoulders of the recesses, and a connection between said draw-bar extensions or plates substantially as specified.

2. In a tandem-spring draft-rigging, the

combination with the draft-timbers and stopcastings, of tandem arranged springs, followers bearing against the end of the springs, a draw-har against the rear end of which the vfront follower abuts, a rear spacing or abut- WILLIAM H. MINER.

IVitnesses:

H. M. MUNDAY, L. E. CURTIS. 

